TRANSPORT LAYER
TRANSMISSION CONTROL PROTOCOL TCP
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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physical/Network interface
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transport
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application
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internet
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Detailed explanation-1: -SMTP is part of the application layer of the TCP/IP protocol.
Detailed explanation-2: -SMTP is an application layer protocol that is used to transmit electronic mail. The SMTP sender process uses a randomly assigned TCP port above 1023 to send SMTP messages to the SMTP receiver process that is listening at the well-known TCP port 25.
Detailed explanation-3: -There are three common protocols used to deliver email over the Internet: the Simple Mail Transfer Protocol (SMTP), the Post Office Protocol (POP), and the Internet Message Access Protocol (IMAP). All three use TCP, and the last two are used for accessing electronic mailboxes.
Detailed explanation-4: -SMTP provides the ability to send and receive email messages. SMTP is an application-layer protocol that enables the transmission and delivery of email over the Internet. SMTP is created and maintained by the Internet Engineering Task Force (IETF). Simple Mail Transfer Protocol is also known as RFC 821 and RFC 2821.